Summary.
The reductive metallation of 3,4-diphenylcinnoline (1) by sodium metal in tetrahydrofuran under an inert atmosphere to the monomeric dianion 2 has been explored, and the nucleophilicity of the disodium adduct towards various protonation, alkylation, and acylation reagents has been investigated. Generally, 2 reacts via its 1,4-positions forming 1,4-dihydro derivatives of 1.
Zusammenfassung.
Die Herstellung des monomeren Dianions von 3,4-Diphenylcinnolin durch reduzierende Metallierung mit metallischem Natrium in Tetrahydrofuran unter einer inerten Atmosphäre sowie die Nucleophilie dieses Dinatriumaddukts gegenüber verschiedener Protonierungs-, Alkylierungs- und Acylierungsreagenzien wurden untersucht. Das Dianion reagiert durchwegs über die Positionen 1 und 4 zu 1,4-Dihydroderivaten von 3,4-Diphenylcinnolin.
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Received May 13, 1998. Accepted (revised) February 17, 1999
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Öcal, N., Turgut, Z. & Kaban, Ş. Reactions of the Dianion Obtained by Reductive Metallation of 3,4-Diphenylcinnoline. Monatshefte fuer Chemie 130, 915–920 (1999). https://doi.org/10.1007/PL00010272
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DOI: https://doi.org/10.1007/PL00010272